prateeksikka Posted February 25, 2005 Report Share Posted February 25, 2005 HI ALL! I HAVE SEE MANY T.V CORDS WHICH CONNECT IT TO230V AC.BUT I HAVE NEVER SEEN A 3 PIN CORD.i.e A TV I HAVE NEVER SEEN GROUNDED.CAN ANYONE TELL WHY?PRATEEK Quote Link to comment Share on other sites More sharing options...
MP Posted February 27, 2005 Report Share Posted February 27, 2005 My TV has a three prong plug on it for grounding.MP Quote Link to comment Share on other sites More sharing options...
pejmanajorloo Posted March 2, 2005 Report Share Posted March 2, 2005 You can see this site http://www.iguanalabs.com/7805kit.htm Quote Link to comment Share on other sites More sharing options...
masterteach Posted March 3, 2005 Report Share Posted March 3, 2005 safety (earth) ground is not needed by most modern tvsbecause they use double insulation for safety from electrecution Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted March 3, 2005 Author Report Share Posted March 3, 2005 hi all!anyone who can relate the reason with high voltage inside the TV?AND IF PROPER DOUBLE INSULATION ,WHY ARE NOT OTHER DEVICES LIKE AIR CONDITIONERS,ELECTRIC IRON,REFRIGERATORS MADE SO?PRATEEK Quote Link to comment Share on other sites More sharing options...
gg4rest Posted March 3, 2005 Report Share Posted March 3, 2005 There is high voltage inside a TV set to launch the electrons through the CRT with enough velocity to cause the phosphor coating to light up. There is also a high voltage for the steering coils to cause the electron beam to curve to allow it to hit the top and bottom rows of the set and to scan across each row.I assume TVs don't have a ground pin because they likely have an isolation amplifier inside them which would separate the TV set from the household power. This would prevent noise from the household power from recking the tv signal. I'm not sure though. The reason that Air Conditioners, irons, and refrigerators would not, is because noise travelling to those devices is typically not as big a problem so an isolation transformer wouldn't be necessary. Quote Link to comment Share on other sites More sharing options...
MP Posted March 4, 2005 Report Share Posted March 4, 2005 My TV, and the air conditioner for my shop, and my refrigerator all have a 3 prong plug. 8)MP Quote Link to comment Share on other sites More sharing options...
Dazza Posted March 4, 2005 Report Share Posted March 4, 2005 MP, a refrigerator for your lunch and an air-conditioner to keep you cool, so you can be productive 8), but what's the TV for ;D, do your employees get a TV as well ;D ;D ;D. Quote Link to comment Share on other sites More sharing options...
MP Posted March 4, 2005 Report Share Posted March 4, 2005 uhh....research, yeah, that's it. It is a productive tool. ;D ;D...actually, the TV and refrigerator are not in the shop. Only the air conditioner is in the shop. ;)MP Quote Link to comment Share on other sites More sharing options...
gg4rest Posted March 4, 2005 Report Share Posted March 4, 2005 My TVs all have only 2 prongs. Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted March 5, 2005 Author Report Share Posted March 5, 2005 hi all!does it have to do with very high voltage inside it?i know that i have to be careful when i open up a TV rather in all AC circuits where netvoltage is not the algebraic sum but phasor sum of the drops across the components.any comments?prateek Quote Link to comment Share on other sites More sharing options...
steven Posted April 26, 2005 Report Share Posted April 26, 2005 :)the 3 prongs plug on the tv if you wonder what that lonely looking prong is it is the earth prong, in the case of a short or hv wire comeing off inside , then the hv will be grounded through that earth prong Quote Link to comment Share on other sites More sharing options...
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